The recent astonishing realization of the negative absolute temperature (NAT) for motional degrees of freedom (Braun et al., 2013) inspires its possible application to the early universe. The existence of the upper bound on the energy of the system is the sufficient requirement for a NAT and this might correspond to the Planck scale at the Big Bang model. It has been argued that standard inflation requires an initial patch that is smooth over distance scales a bit larger than the causal horizon at the onset of inflation. We show that this initial condition problem can be solved if the NAT fermion, dubbed “NATON”, occupies the Universe before the standard inflation is ignited by providing mini inflation prior to the standard one. As long as NATON dominated era lasts until at least ten times older than the Planck time, it makes the Universe homogeneous enough to derive the successful standard inflation.

最近关于运动自由度的负绝对温度（NAT）的惊人实现（Braun等，2013）激发了其在早期宇宙中的可能应用。系统能量上限的存在是对NAT的充分要求，这可能与Big Bang模型中的Planck规模相对应。有人认为，标准通货膨胀需要一个初始距离，该距离在距离尺度上是平滑的，该距离比通货膨胀开始时的因果水平要大一些。我们证明，如果在标准通货膨胀被点燃之前，通过在标准通货膨胀之前提供微型通货膨胀，被称为“ NATON”的NAT费米子占据宇宙，就可以解决这个初始条件问题。只要以纳顿为主导的时代持续到比普朗克时代至少早十倍，